Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 34

Thread: Making 488 from 976 using nonlinear crystals

  1. #11
    Join Date
    Aug 2005
    Location
    Silicon Valley
    Posts
    442

    Default

    If anyone is interested, I have 4 of the DFB stabilized 976nm diode laser modules used in the Melles 488 lasers in the stash here. They've got the relay protection board attached so I can't see the exact model number, but if someone is interested, I'll open a package and find out.

  2. #12
    Join Date
    Feb 2011
    Location
    New Hampshire
    Posts
    3,513

    Default

    Are these intra-cavity doubled or extra-cavity doubled? Is the only additional component required a nonlinear crystal such as BBO or is a cavity required as well?

    PS. I am now deep into a pulsed dye project. The first video will be in a couple of days and so no time now for a review of the DPSS.

  3. #13
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    Hey Sir P -- I wouldn't mind seeing that vid of the LS pumped yellow dye again .. do you have that link handy? What's the new dye project if I dare to ask ??

  4. #14
    Join Date
    Feb 2011
    Location
    New Hampshire
    Posts
    3,513

    Default

    Here's the link:
    http://www.youtube.com/watch?v=xAYxfsHyVSA

    The world record for a dye laser pulse is 400J. I can't find any reference to a higher pulse energy. I recently converted a small medical dye laser (the next video) and am now upgrading it. If successful then I'll upgrade it again and just maybe...

  5. #15
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    10W of lemon-yellow aaaahhghhhhh .......
    Click image for larger version. 

Name:	homer drool.png 
Views:	5 
Size:	63.2 KB 
ID:	44941

    That looks so much better than red+green mixed imho ..

    Click image for larger version. 

Name:	lemon yellow.jpg 
Views:	28 
Size:	95.5 KB 
ID:	44942



    Thanks for the link Sir Planters. Awe inspiring.

    Now on to breaking the world record. Set the bar high for yourself much ??

  6. #16
    Join Date
    Aug 2005
    Location
    Silicon Valley
    Posts
    442

    Default

    Quote Originally Posted by planters View Post
    I'm waiting for the gap between 532 and 638 to be filled. This is a huge spread and if addressed the whole 532 vs 520 debate becomes moot.
    OPSL. This is 10W @ 577nm.

    Click image for larger version. 

Name:	UV99-577.jpg 
Views:	37 
Size:	51.6 KB 
ID:	44943

  7. #17
    swamidog's Avatar
    swamidog is online now Jr. Woodchuckington Janitor III, Esq.
    Join Date
    Nov 2006
    Location
    santa fe, nm
    Posts
    1,545,752

    Default

    the gold line from copper vapor lasers is very beautiful (578.2), but it's useless for anything but beams.

    Click image for larger version. 

Name:	pic00033.jpg 
Views:	44 
Size:	13.8 KB 
ID:	44944

    Quote Originally Posted by Junktronix View Post
    OPSL. This is 10W @ 577nm.

    Click image for larger version. 

Name:	UV99-577.jpg 
Views:	37 
Size:	51.6 KB 
ID:	44943
    suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.

  8. #18
    Join Date
    Aug 2005
    Location
    Silicon Valley
    Posts
    442

    Default

    Comparing your dye laser to the LS600's I've worked with, I noticed that you removed the BRF from the dye cavity. My understanding is that the BRF narrows the gain region and allows the wavelength to be tuned to some extent. I always wanted to try pulling it to see what happens. Are you getting a broad output spectrum? Is this with the LS standard dye pack or did you mix your own?

    Quote Originally Posted by planters View Post
    Here's the link:
    http://www.youtube.com/watch?v=xAYxfsHyVSA

    The world record for a dye laser pulse is 400J. I can't find any reference to a higher pulse energy. I recently converted a small medical dye laser (the next video) and am now upgrading it. If successful then I'll upgrade it again and just maybe...

  9. #19
    Join Date
    Aug 2005
    Location
    Silicon Valley
    Posts
    442

    Default

    Still working on a test harness for these, but the one I removed from the relay board seems to be working. They are Bookham (Oclaro) LC95A76ULR-20R which are rated to make 300mW. I've also contacted Alphalas and am awaiting a quote for a kit of parts including the PP-KTP to build a 488nm laser using these diodes.


    Quote Originally Posted by Junktronix View Post
    If anyone is interested, I have 4 of the DFB stabilized 976nm diode laser modules used in the Melles 488 lasers in the stash here. They've got the relay protection board attached so I can't see the exact model number, but if someone is interested, I'll open a package and find out.

  10. #20
    Join Date
    Feb 2011
    Location
    New Hampshire
    Posts
    3,513

    Default

    Junktronix,

    I pulled the BRF because I wanted the gain bandwidth to OPTIMALLY overlap the custom optics I got from CVI. The output coupler has a partial reflectance that is unavoidably broad ie it is about the same at 560nm and 590nm. I let the dye and cavity find the highest gain wavelength. This can be adjusted to some extent by altering the concentration of dye, but when maximum power is the target the optimal concentration is then again limited. You keep adding concentrate (I mix my own) until the power stops increasing. The result ended up right at the 575nm I was looking for (I was a little lucky here), but I would have been happy at 585 and 565. The maximum output for the system at 575nm is 20W.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •